12402788 has 6 divisors (see below), whose sum is σ = 21704886. Its totient is φ = 6201392.

The previous prime is 12402781. The next prime is 12402799. The reversal of 12402788 is 88720421.

It can be written as a sum of positive squares in only one way, i.e., 12334144 + 68644 = 3512^2 + 262^2 .

It is not an unprimeable number, because it can be changed into a prime (12402781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1550345 + ... + 1550352.

It is an arithmetic number, because the mean of its divisors is an integer number (3617481).

Almost surely, 2^12402788 is an apocalyptic number.

It is an amenable number.

12402788 is a deficient number, since it is larger than the sum of its proper divisors (9302098).

12402788 is a wasteful number, since it uses less digits than its factorization.

12402788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3100701 (or 3100699 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 32.

The square root of 12402788 is about 3521.7592194811. The cubic root of 12402788 is about 231.4762511265.

The spelling of 12402788 in words is "twelve million, four hundred two thousand, seven hundred eighty-eight".